Drug-Resistant Falciparum Malaria among the Mayongong Indians in the Brazilian Amazon

José J. FerraroniDepartment of Microbiology, University of Montana, Department of Preventive Medicine and Community Health, Texas Tech University School of Medicine, Missoula, Montana 59812

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Jack HayesDepartment of Microbiology, University of Montana, Department of Preventive Medicine and Community Health, Texas Tech University School of Medicine, Missoula, Montana 59812

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In April of 1977 an outbreak of falciparum malaria occurred among the Mayongong Indians, located at Uauaris in the Territory of Roraima, Brazil. Blood specimens from 157 Indians were examined for Plasmodium; 62 were found to be infected. In three cases the infection was not cured with chloroquine but responded favorably to the drug combination of sulfadoxine and pyrimethamine (Fansidar®).

Author Notes

On leave from the National Research Institute of the Amazon (I.N.P.A.), Manaus, Brazil—Hospital for Tropical Diseases, University of the Amazon.

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